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What should refrigerant gauges read when charging walk in freezer?

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  • salex_bryan Jul 31, 2009

    Freezer being charged with R404, so what should it read? Thank you in advance, and for answering.



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Depends on what kind of refrigerant its works, if is an old unit probably is charged with R12 or R22 newer ones work with R404 ;for R12 presures should be around 20psi on the low side and 160 on the high side ,for R22 about 60 and 250 and for R404 50 and 350 ;you have to look at the condensing unit tag to find out what type of freon its uses ,or look at the expansion valve at the evaporator coil.

Posted on Jul 31, 2009

  • christian nielsen Aug 01, 2009

    Between 45 to 60 on the low side but no higher than 350 on the high side ;make sure the condensing coil is clean and the evaporator too.


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How check superheat

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Is that on a hot box or cold?

Posted on Feb 18, 2012

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